Attached is a file VoiceMessage.zip which in turn contains VoiceMessage.exe which has a VirusTotal detection rate of 11/47. Automated analysis tools [1][2] show an attempted connection to casbir.com.au
on 67.22.142.68 (Cologlobal, Canada). This appears to be the only server on this IP address, so blocking or monitoring it for the time being may be prudent.